Malaria is an arthropod disease,
Malaria 240 570 1000 (sq 1205 1777-1 2340 5910 6831-6 8493-4) Hz
and also for blur vision,
Arthropod Disease Including Encephalitis II
repeated here because it is common and important. This disease in the eyes may make the patient susceptible to hypnosis.
Good luck.